Q61. Consider the following statements:

Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors.

Statement II: Some rare earth elements have phosphorescent properties.

Which one of the following is correct in respect of the above statements?

With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: 1. RTGs are miniature fission reactors. 2. RTGs are used for powering the onboard systems of spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development. Which of the statements given above are correct?

Consider the following statements: Statement-I: India, despite having uranium deposits, depends on coal for most of its electricity production. Statement-II: Uranium, enriched to the extent of at least 60%, is required for the production of electricity. Which one of the following is correct in respect of the above statements?

India is an important member of the ‘International Thermonuclear Experimental Reactor’. If this experiment succeeds, what is the immediate advantage for India?

Due to improper/indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste? 1. Beryllium?2. Cadmium 3. Chromium?4. Heptachlor 5. Mercury?6. Lead 7. Plutonium Select the correct answer using the codes given below:

To meet its rapidly growing energy demand, some opine that India should pursue research and development on Thorium as the future fuel of nuclear energy. In this context, what advantage does Thorium hold over uranium? 1. Thorium is far more abundant in nature than uranium. 2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium. 3. Thorium produces less harmful waste in comparison to uranium. Which of the statements given above is/are Correct?

Recently, there has been a concern over the short supply of a group of elements called ‘rare earth metals’. Why? 1. China, which is the largest producer of these elements, has imposed some restrictions on their export. 2. Other than China, Australia, Canada and Chile, these elements are not found in any country. 3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements. Which of the statements given above is/are correct?

The function of heavy water in a nuclear reactor is to?

Recently, LASIK (Laser Assisted in Situ Keratomileusis) procedure is being made popular for vision correction. Which one of the following statements in this context is not correct?

With reference to the treatment of cancerous tumours, a tool called cyberknife has been making the news. In this context, which one of the following statements is not correct?

In the year 2008, which one of the following conducted a complex scientific experiment in which sub-atomic particles were accelerated to nearly the speed of light?

In which one of the following locations is the Internationals Thermonuclear Experimental Reactor (ITER) Project to be built?

Who among the following discovered heavy water?

In the context of the Indian defence, what is ‘Dhruv’?

Consider the following statements: 1. Indira Gandhi Centre for Atomic Research uses fast reactor technology 2. Atomic Minerals Directorate for Research and Exploration is engaged in heavy water production 3. Indian Rare Earths Limited is engaged in the manufacture of Zircon for India's Nuclear programme beside other rare earth products. Which of these statements given above are correct?

A radioactive substance has a half-life of four Months. Three fourth of the substance would decay in

Which one of the following is not radioactive?

Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because

Cobalt-60 is commonly used in radiation therapy because it emits

Which one of the following elements is essential for the construction of nuclear reactors?

Which one of the following elements is essential for the construction of nuclear reactors?

The alpha particle carries two positive charges. Its mass is very nearly equal to that of

The difference between a nuclear reactor and an atomic bomb is that

Yellow cake, an item of smuggling across borders is

Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?

The half-life of a radioactive element is 5 years. The fraction of the radioactive substance that remains after 20 years is

Monazite is an ore of

Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material?

Which one of the following is used for dating archaeological specimens in wood, bones and shells?

Atoms of the same element having the same atomic number but different atomic weight are called

Photons have properties similar to that of

Elements having atomic number higher than ‘92’ in the periodic table are known as

Consider the following statements regarding hemoglobin: 1. It contains iron 2. It is a carrier of oxygen in the blood 3. It imparts red colour to the blood 4. It provides immunity against certain diseases Of these statements

Consider the following effects of genetic engineering: 1. Disease resistance 2. Growth promotion 3. Cloning 4. Longevity Of these effects, those that have been tried out with a certain amount of success include

Neutron was discovered by

The fuel used in Fast Breeder Test Reactor at Kalpakkam is

Radioactive element which has been found to have large reserves in India is

Mesons are found in

Radiocarbon dating process is used to know the age of

The radiant energy of the sun is due to

Fuel used in a nuclear reactor is

Isotopes of the same element differ in the number of